MoO_3在介孔分子筛MCM-41上分散状况的研究

Study of Dispersity of MoO_3 on the Surface of Mesoporous Molecular Sieve MCM-41

采用 XPS和 XRD方法 ,测定了 Mo O3在未经改性的 MCM- 41及用 Al2 O3和 Ti O2 改性后的 MCM- 41上的单层分散阈值 .发现 ,Mo O3在用 Al2 O3和 Ti O2 改性后的 MCM- 41上的单层分散阈值比未经改性的 MCM- 41上的要提高三分之二 .另外 ,借助 Mo O3/MCM- 41、Mo O3/Al2 O3- MCM- 41、Mo O3/Ti O2 - MCM- 41系列样品的比表面积和孔分布测定 ,研究了 Mo O3在未经改性的 MCM- 41及用 Al2 O3和 Ti O2 改性后的 MCM-

XPS and XRD methods were used to determine the monolayer dispersion capacity of MoO\-3 on the surface of unmodified MCM\|41, and Al\-2O\-3, TiO\-2 modified MCM\|41 as well. It is found that the monolayer dispersion capacity of MoO\-3 on the surface of Al\-2O\-3, TiO\-2 modified MCM\|41 is two thirds greater than that on unmodified MCM\|41. Besides, the dispersity of MoO\-3 on the surface of unmodified MCM\|41 and Al\-2O\-3, TiO\-2 modified MCM\|41 was also studied by measuring the BET surface area and pore size distributions of MoO\-3/MCM\|41, and MoO\-3/Al\-2O\-3\|MCM\|41, MoO\-3/TiO\-2\|MCM\|41 samples.